Fuel/Emission Notes

Fuel/Emission Notes

^ The vacuum routing for the dashpot diaphragm and purge cut-off solenoid valve on most '89 and all '90 Civic 3-doors, 4-doors, and Wagons is shown incorrectly in the S/M's. The S/M's show the early '89 routing: one vacuum port on the intake manifold, a T-fitting, and three connecting hoses. Late '89 and all '90 models have two vacuum ports and two connecting hoses (the same as '91 models).

^ The idle speed in the ignition timing specs for '89-90 Civic 3-doors, 4-doors, and CRX Std's is incorrect. The correct idle speed it 750 +/- 50 rpm (as listed on the under-hood label). The S/M pages you should correct are:
'89 Civic: 23-63 '89 CRX: 23-56
'90 Civic: 23-65 '90 CRX: 23-58

^ The ECU's in late-production '92 Civics with D15B7 or D15B8 engines have been changed to cut fuel to the engine at 113 mph (182 km/h). (Originally, only the D15Z1 engine had this feature.)